Coldcard Hack Exposes $70M Vulnerability in Hardware Wallets
A critical vulnerability in Coldcard hardware wallets has exposed a design flaw that allowed attackers to steal approximately 594 bitcoins—worth roughly $38 million at theft time, though later analysis suggests the total may exceed $70 million—from nearly 500 single-signature wallets in a 25-minute window on July 30. The breach, disclosed by Canadian hardware wallet manufacturer…